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R301.6 Roof Load
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The roof shall be designed for the live load indicated in Table R301.6 or the ground snow load indicated in Table R301.2, whichever is greater.
TABLE R301.6
MINIMUM ROOF LIVE LOADS IN POUNDS-FORCE PER SQUARE FOOT OF HORIZONTAL PROJECTION| ROOF SLOPE | TRIBUTARY LOADED AREA IN SQUARE FEET FOR ANY STRUCTURAL MEMBER | ||
| 0 to 200 | 201 to 600 | Over 600 | |
| Flat or rise less than 4 inches per foot (1:3) | 20 | 16 | 12 |
| Rise 4 inches per foot (1:3) to less than 12 inches per foot (1:1) | 16 | 14 | 12 |
| Rise 12 inches per foot (1:1) and greater | 12 | 12 | 12 |
For SI: 1 square foot = 0.0929 m2, 1 pound per square foot = 0.0479 kPa, 1 inch per foot = 83.3 mm/m.
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